1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.internal.telephony; 18 19 import android.annotation.Nullable; 20 import android.content.Context; 21 import android.content.Intent; 22 import android.content.pm.PackageManager; 23 import android.content.pm.ResolveInfo; 24 import android.os.Binder; 25 import android.os.PersistableBundle; 26 import android.telephony.CarrierConfigManager; 27 import android.telephony.Rlog; 28 29 import java.util.List; 30 31 /** 32 * This is a basic utility class for common Carrier SMS Functions 33 */ 34 public class CarrierSmsUtils { 35 protected static final boolean VDBG = false; 36 protected static final String TAG = CarrierSmsUtils.class.getSimpleName(); 37 38 private static final String CARRIER_IMS_PACKAGE_KEY = 39 CarrierConfigManager.KEY_CONFIG_IMS_PACKAGE_OVERRIDE_STRING; 40 41 /** Return a Carrier-overridden IMS package, if it exists and is a CarrierSmsFilter 42 * 43 * @param context calling context 44 * @param phone object from telephony 45 * @param intent that should match a CarrierSmsFilter 46 * @return the name of the IMS CarrierService package 47 */ 48 @Nullable getCarrierImsPackageForIntent( Context context, Phone phone, Intent intent)49 public static String getCarrierImsPackageForIntent( 50 Context context, Phone phone, Intent intent) { 51 52 String carrierImsPackage = getCarrierImsPackage(context, phone); 53 if (carrierImsPackage == null) { 54 if (VDBG) Rlog.v(TAG, "No CarrierImsPackage override found"); 55 return null; 56 } 57 58 PackageManager packageManager = context.getPackageManager(); 59 List<ResolveInfo> receivers = packageManager.queryIntentServices(intent, 0); 60 for (ResolveInfo info : receivers) { 61 if (info.serviceInfo == null) { 62 Rlog.e(TAG, "Can't get service information from " + info); 63 continue; 64 } 65 66 if (carrierImsPackage.equals(info.serviceInfo.packageName)) { 67 return carrierImsPackage; 68 } 69 } 70 return null; 71 } 72 73 @Nullable getCarrierImsPackage(Context context, Phone phone)74 private static String getCarrierImsPackage(Context context, Phone phone) { 75 CarrierConfigManager cm = (CarrierConfigManager) context.getSystemService( 76 Context.CARRIER_CONFIG_SERVICE); 77 if (cm == null) { 78 Rlog.e(TAG, "Failed to retrieve CarrierConfigManager"); 79 return null; 80 } 81 82 final long identity = Binder.clearCallingIdentity(); 83 try { 84 PersistableBundle config = cm.getConfigForSubId(phone.getSubId()); 85 if (config == null) { 86 if (VDBG) Rlog.v(TAG, "No CarrierConfig for subId:" + phone.getSubId()); 87 return null; 88 } 89 return config.getString(CARRIER_IMS_PACKAGE_KEY, null); 90 } finally { 91 Binder.restoreCallingIdentity(identity); 92 } 93 } 94 CarrierSmsUtils()95 private CarrierSmsUtils() {} 96 } 97